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Epson ELP-3500 Service Manual

Epson ELP-3500 Service Manual

Epson elp-3500 lcd projector service manual
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ELP-3500
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TM-ELP3500
Epson America, Inc.

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Summary of Contents for Epson ELP-3500

  • Page 1 Service Manual ELP-3500 www.electronicsrepair.net TM-ELP3500 Epson America, Inc.
  • Page 2 ELP-3500 Service Manual...
  • Page 3 INTRODUCTION This service manual describes hardware information necessary for field service and troubleshooting of the ELP-3500 Projector. Manual updates will be supplied in service bulletins. HOW TO USE THIS SERVICE MANUAL The manual covers topics required for field maintenance, so you can use it for diagnosis of failures or repair.
  • Page 4 2. RESTRICTIONS FOR PARTS REPLACEMENT * Use only authorized parts or EPSON-supplied parts for replacement of mechanical components, including the light source lamp, fuse, air filter, and so on.
  • Page 5 * Basic knowledge of electricity (safety operations, circuit diagrams, static electricity, etc.) OTHERS * For questions on ELP-3500 maintenance, including service parts or document contents, contact the address below. Any technical information about changes will be released as necessary in service bulletins.

  • Page 6: Table Of Contents

    Contents Chapter 1 Product Features 1. 1 Product Features ..................1-1 1.2 Parts of the Projector ................. 1-2 1.2.1 Exterior View of the Main Frame ............1-2 1.2.2 Interior View of the Main Frame ............1-4 1.2.3 Exterior View of the Remote Control ..........1-5 1.2.4 Interior of the Remote Control ............
  • Page 7 Chapter 3 Disassembly and Assembly 3.1 Disassembly and Assembly Procedures ............ 3-1 3.2 Projector Main Unit Disassembly and Assembly ........3-3 3.2.1 Removing the Lamp Inner Housing........... 3-4 3.2.2 Removing the Upper Case Unit and Handle ........3-5 3.2.3 Removing the Air Filter Frame............3-7 3.2.4 Removing the Main Board Block ............

  • Page 8: Product Features

    1.1 PRODUCT FEATURES The ELP-3500 Projector is an easy-to-use, portable presentation device with a VGA resolution that lets you project enhanced color images from personal computers and video equipment, such as VCRs, video camcorders, and video disc players. Figure 1-1.

  • Page 9: Parts Of The Projector

    EPSON ELP-3500 Service Manual DDC compliance The ELP-3500 conforms to DDC 1/2 standards. When you connect this device to the computer conforming to DDC, the output signals of it are automatically converted into VGA images and projected. Simple Maintenance Maintenance is easy, and the number of adjustments has been minimized.
  • Page 10 EPSON ELP-3500 Service Manual Figure 1-4. 1. VCR Syn-Video 6. Serial Port to Mouse Port 2. VCR Video (DB9 or PS/2) 3. VCR Audio Left 7. VGA Connection for Video 4. VCR Audio Right from Computer 5. Output for External Speakers 8.

  • Page 11: Interior View Of The Main Frame

    EPSON ELP-3500 Service Manual 1.2.2 INTERIOR VIEW OF THE MAIN FRAME Power Supply Safety Switch Main Board Figure 1-7. Control Panel Driver Board Speaker Interface Unit Projector Lens Figure 1-8.

  • Page 12: Exterior View Of The Remote Control

    EPSON ELP-3500 Service Manual 1.2.3 EXTERIOR VIEW OF THE REMOTE CONTROL Figure 1-9.

  • Page 13: Interior Of The Remote Control

    EPSON ELP-3500 Service Manual 1.2.4 INTERIOR VIEW OF THE REMOTE CONTROL Figure 1-10. Figure 1-11.

  • Page 14: Connection

    EPSON ELP-3500 Service Manual 1.3 CONNECTION 1.3.1 MS-DOS and Compatibles Desktop Figure 1-12. Notebook Figure 1-13. * Attached accessories...

  • Page 15: Macintosh

    EPSON ELP-3500 Service Manual 1.3.2 Macintosh Desktop * Attached accessories Figure 1-14. DIP switch settings must match machine type. Refer to the table below for details. (The default setting is MAC13 mode.) Table 1-1. Mode Switch A ON Switch B ON MAC13”...

  • Page 16: Main Components

    EPSON ELP-3500 Service Manual PowerBook Figure 1-16. 1.4 MAIN COMPONENTS Main Board Figure 1-17.
  • Page 17 EPSON ELP-3500 Service Manual Driver Board Figure 1-18. Interface Unit Figure 1-19. 1-10...
  • Page 18 EPSON ELP-3500 Service Manual Power Supply Unit Power Supply Unit Figure 1-20. Light Guide Block Figure 1-21. 1-11...
  • Page 19 EPSON ELP-3500 Service Manual Optical Head Unit Figure 1-22. Projector Lens Unit Figure 1-23. 1-12...
  • Page 20 EPSON ELP-3500 Service Manual Lamp Inner Housing Figure 1-24. Control Panel Figure 1-25. 1-13...

  • Page 21: Specifications

    EPSON ELP-3500 Service Manual 1.5 SPECIFICATIONS Table 1-2. OPTICAL FEATURES Display method Transparency-type, TFT color liquid crystal display (R/G/B) Projection image size 21 inches minimum to 300 inches maximum Projection distance 3.9 to 40.3 feet (1.2 to 12.3 m) Resolution 640 x 480 dots;...

  • Page 22: Interface Specifications

    EPSON ELP-3500 Service Manual 1.6 INTERFACE SPECIFICATIONS 1.6.1 Mouse Interface Specifications Features This interface is provided on an optional cable (not on the projector). Supports a keyboard as well as a mouse Mini DIN 6-pin connector I/O data communication is enabled.
  • Page 23 EPSON ELP-3500 Service Manual Asynchronous Data Bus (ADB) Port Features This interface is provided on an optional cable (not on the projector). 10 kbps serial bus Supports a keyboard or a mouse. Mini DIN 4-pin connector I/O data communication is enabled.
  • Page 24 This function converts data transmitted from a remote control into mouse data for a PS/2, ADB, or serial mouse. The ELP-3500 mouse function does not support a serial mouse. In the I/F CPU, the function controls the mouse CPU, which controls the multi-mouse port.

  • Page 25: Computer Interface Board

    EPSON ELP-3500 Service Manual 1.6.2 Computer Interface Board Figure 1-28.Computer Video Input Table 1-7. Computer Video Input D-SUB 15 (HD) Signal Signal Red video +5 V Green video Synchronous GND Blue video Monitor (ID bit 0) Monitor (ID bit 2)

  • Page 26: Video Interface Board

    EPSON ELP-3500 Service Manual Table 1-9. Signal Signal DATA LEFT RIGHT +5 V 1.6.4 Video Interface Board S-terminal input Figure 1-31. Mini DIN 4-pin with Detection Pin Table 1-10. Signal 1, 2, 6 Y signal input C signal input Input detection terminal CVBS input RCA, gold-plated connector (only insertion portion), right angle H=15 mm;...
  • Page 27 EPSON ELP-3500 Service Manual Video audio input L, R RCA, gold-plated connector (only insertion portion), right angle H=15 mm; colors: L = white; R = red Pins 3, 6 Pins 4, 7 Pins 5, 8 Figure 1-33. Table 1-12. Signal...

  • Page 28: I/O Terminal Layout

    EPSON ELP-3500 Service Manual 1.6.5 I/O Terminal Layout The terminals listed below are vertically located in two rows on the rear panel. Table 1-14. Left row, from top to bottom S-Video terminal input (mini DIN 4) CVBS video input (RCA-yellow)
  • Page 29 EPSON ELP-3500 Service Manual 1-22...

  • Page 30: Hardware

    2.1 HARDWARE The optical and electrical systems are the major areas of projector hardware. The lower level (below the broken line in the figure) shows the optical system, and the upper level shows the electrical system. POWER DRIVER BOARD: MAIN BOARD: IINTERFACE SUPPLY UNIT: Generates the...

  • Page 31: Electrical System Connections

    EPSON ELP-3500 Service Manual 2.1.1 ELECTRICAL SYSTEM CONNECTIONS Electrical units are physically connected to the main board, as shown below. Intake Fan Receptor Board Speaker Power Supply Unit CN600 CN502 CN400 CN504 CN501 Main Board Control Panel CN505 CN200 CN503...

  • Page 32: Optical System Connections

    EPSON ELP-3500 Service Manual 2.1.2 OPTICAL SYSTEM CONNECTIONS The optical system consists of 4 blocks (lamp inner/outer housing, light guide unit, optical head, and projector lens), as shown below. Lamp Inner/Outer Optical Head Housing Light Guide Unit Projector Lens Figure 2-3.

  • Page 33: Power Supply Unit

    EPSON ELP-3500 Service Manual 2.2 POWER SUPPLY UNIT The power supply unit includes a DC regulator, exhaust fan, and interlock switch for the lamp cover. This unit generates the voltages for the control circuit (+5 V, +12 V, +18 V) and for the light source lamp (+65 V) from the AC input.
  • Page 34 EPSON ELP-3500 Service Manual Functional Outline * The interlock switch at the bottom of main chassis shuts off AC power when the lamp cover is opened. It is normally in the ON position. * The cable connected to CN505 on the main board is a signal line to indicate the conditions of two fans (the exhaust fan and intake fan), which are connected to connectors CN503 and CN502 on the main board.

  • Page 35: Main Board

    EPSON ELP-3500 Service Manual Pin Assignments CN501 Pin 15 CN505 Pin 1 (Red) Figure 2-7. Table 2-4. Pin No. Signal Lamp on/off — Ground +18 V +12 V (b) +12 V (a) 10-12 +5 V 2.3 MAIN BOARD The driver board consists of the CPU, P-ROM, video memory, digital video processor, and circuits to control the interface, control panel, fan, speaker, receptor board interface, etc.
  • Page 36 EPSON ELP-3500 Service Manual Table 2-5. Fuses Specifications Purpose FU500 451002 (2 A) +18 V ROM/Interface FU501 451002 (2 A) +12 VS Fan/speaker FU502 451002 (2 A) +12 VA Interface FU503 CCP2E20 (0.8 A) +5 VA A/D converter FU504 451002 (2 A)
  • Page 37 EPSON ELP-3500 Service Manual Main Board Circuit Block Fuse +18 V FU500 451002 (2 A) FU501 451002 (2 A) +12 VS +12 VA FU502 451002 (2 A) Connects to the power supply +5 VA FU503 CCP2E20 (0.8 A) with cable...
  • Page 38 EPSON ELP-3500 Service Manual Functional Outline * When power is turned on, the driver board activates the reset signal, which is controlled by IC601, and the CPU reads the program from flash ROM and writes it into RAM (IC303). Then the CPU sets the functions based on the program and projects the initial image.
  • Page 39 EPSON ELP-3500 Service Manual * The projector has a timer circuit that controls the operating time of the light source valve. Its operation is described below. Table 2-6. Light Source State Lamp Monitor State Typically, the light from the projector lamp starts to dim after about 4000 hours of use.

  • Page 40: Driver Board

    EPSON ELP-3500 Service Manual 2.4 DRIVER BOARD The driver board has a circuit for converting the signals from the main board into six analog signal states and controlling the brightness and detecting the temperature. The board can be replaced as a whole unit for maintenance service. The fuses on the board are shown below.
  • Page 41 EPSON ELP-3500 Service Manual Circuit Block Diagram of the Video Board Fuses Power F600 CCP2E20 (600 mA) Regulator +18 V supply F601 CCP2E20 (600 mA) Regulator +12 V 5 VDA F602 CCP2E13 (520 mA) +5 V Temperature RT 0 ~ 7...

  • Page 42: Interface Board Unit

    EPSON ELP-3500 Service Manual 2.5 INTERFACE BOARD UNIT This unit consists of two boards (IB1 and IB2) with interfaces that can be connected to external devices (the host computer, external speaker, and video device). The unit involves the input/output interface connector and the noise filter circuit.
  • Page 43 EPSON ELP-3500 Service Manual Interface board (IB2) Current limiter Mouse/ Noise filter J100 (diode circuit) (100 connector Connects to R/G/B J101 Computer Noise filter CN100 (IF2) (diode circuit) connector on main board H/V/SCL control J102 Audio Noise filter Figure 2-13.

  • Page 44: Control Panel

    EPSON ELP-3500 Service Manual 2.6 CONTROL PANEL The board on this panel contains eight buttons and six LEDs. It is connected to CN504 on the main board. Figure 2-15. 2.7 RECEPTOR BOARD A detector mounted on the receptor board senses the infrared signals from the remote control.

  • Page 45: Speaker Unit

    EPSON ELP-3500 Service Manual 2.8 SPEAKER UNIT Inside the upper case is a speaker. Audio signals from the amplitude circuit on the video board are output to this speaker. Also, audio signals are available from externally connected speakers. In this case, balance between internal and external speakers is adjustable using the fade function.

  • Page 46: Light Guide Block

    EPSON ELP-3500 Service Manual 2.9 LIGHT GUIDE BLOCK The light valve block eliminates ultraviolet rays harmful to the light valves and makes the light intensity from the light source lamp uniform before dividing it into 3 light outputs (R/G/B). Lenses and mirrors built in the block disperse the light. The drawings below show the appearance and an internal block diagram of the light valve block.
  • Page 47 EPSON ELP-3500 Service Manual A/B Multi-lens Dispersion of light from the light source lamp through the A/B multi-lens makes brightness roughly uniform. A UV filter coats the surface of the multi-lens array to eliminate ultraviolet rays. PBS (Polarizing Beam Splitter) Light dispersed through the A/B multi-lens is further dispersed through the PBS to make the light intensity uniform.

  • Page 48: Light Valve R/G/B To Prism Unit

    EPSON ELP-3500 Service Manual 2.10 R/G/B LIGHT VALVES TO PRISM UNIT 2.10.1 R/G/B LIGHT VALVES The R/G/B light valves are each high-density, liquid crystal panels of 307,200 pixels (liquid crystal shutters) of 1.1” (W) x 0.8” (H) (26.9 x 20.2 mm). The condition of the twist level in the liquid crystal shutter can be controlled in units of 8 degrees from a fully closed condition (no light transmission) to a fully open condition (no light blocked).

  • Page 49: Prism Unit

    EPSON ELP-3500 Service Manual 2.10.2 PRISM UNIT The prism unit creates the three lights, which are transmitted through the light valve. Figure 2-21. 2.11 PROJECTOR LENS The projector lens unit has a zoom function (*1.4) and focus adjustment function. Zoom Function Focus Adjustment Figure 2-22.

  • Page 50: Lamp Housing

    EPSON ELP-3500 Service Manual 2.12 LAMP HOUSING The lamp housing consists of the light source valve and connector for the power supply unit. Figure 2-23. * The life expectancy of the light source valve is 4000 hours. When operating time exceeds 4000 hours, the lamp indicator on the control panel blinks automatically.
  • Page 51 EPSON ELP-3500 Service Manual Table 2-10. Warning Light Color Status Temp Projector is hot. Lamp Lamp needs to be replaced. Temp and Lamp Flashing Red Projector problem. Try turning off and back on first. Then see Chapter 4. 2-22...

  • Page 52: Disassembly And Assembly Procedures

    3.1 DISASSEMBLY AND ASSEMBLY PROCEDURES This section explains how to disassemble the ELP-3500. The assembly procedure is the exact reverse of the disassembly procedure. Preparation 1. Remove any rings, wrist watch, cuff links, or other metal accessories likely to come into contact with the equipment.
  • Page 53 EPSON ELP-3500 Service Manual Precautions Read the precautions given in individual assembly and disassembly procedures carefully before starting the procedure. General precautions are given below. When you disassemble the projector main unit, be careful of dust sticking to internal fans and air filters because it can migrate and contaminate the optical unit, which is the heart of the display mechanism, causing display quality to deteriorate.

  • Page 54: Projector Main Unit Disassembly And Assembly

    EPSON ELP-3500 Service Manual 3.2 Projector Main Unit Disassembly and Assembly The flowchart for disassembling the projector main unit is shown below. You can reassemble dismantled projector parts by reversing the order of disassembly. Therefore, unless specifically specified, this manual contains no assembly procedures. Detailed descriptions of disassembly procedures are given in sections 3.2.1 through 3.2.18.

  • Page 55: Removing The Lamp Inner Housing

    EPSON ELP-3500 Service Manual 3.2.1 Removing the Lamp Inner Housing Screws Lamp Cover Figure 3-2. Screws Handle Lamp Inner Housing Figure 3-3. 1. Remove the lamp cover mounting screws from the main unit bottom plate and remove the lamp cover.

  • Page 56: Removing The Upper Case Unit And Handle

    EPSON ELP-3500 Service Manual 3.2.2 Removing the Upper Case Unit and Handle Handle Holder Cover Figure 3-4. Screws Figure 3-5. 1. Pull the handle up. Insert the spring hook into either hole in the handle holder cover and, while pressing the spring hook toward the hole on the opposite side, pull it up to remove the handle.
  • Page 57 EPSON ELP-3500 Service Manual (Continued from the previous page) Screws Figure 3-6. Control Panel Driver Board Speaker Speaker Cable Interface Unit Projector Lens Figure 3-7. 4. Hold the left and right sides (handle and fan guard sides) of the upper case unit and lightly pull the handle straight up.

  • Page 58: Removing The Air Filter Frame

    EPSON ELP-3500 Service Manual 3.2.3 Removing the Air Filter Frame Air Filter Frame Figure 3-8. 1. Push the tab on the air filter frame. Then lift it up.

  • Page 59: Removing The Main Board Block

    EPSON ELP-3500 Service Manual 3.2.4 Removing the Main Board Block Prerequisite: Complete the steps explained in Section 3.2.2. Figure 3-9. 1. Remove 7 wire cables and 2 FPC cables from the main board block. The cables are summarized in the table below.
  • Page 60 EPSON ELP-3500 Service Manual (Continued from previous page) Screw FG Strap Figure 3-10. Screws Screws Remove Bracket Screws Figure 3-11. 2. Remove the screw mounting the FG strap on the power supply unit. Screw: +M3x6 F/Ni Sems P/N 1033025 Mounting torque: 6.0 kg cm = 5.2 lb inch...
  • Page 61 EPSON ELP-3500 Service Manual 3. Remove 7 mounting screws from the main board block (one of the screws mounts the FG strap also). 6 Screws: +M3x6 F/Ni: Sems P/N 1033122 Mounting torque: 6.0 kg cm = 5.2 lb inch 1 Screw: +M3x12 F/Zn: Bind P Tight P/N 1021823 Mounting torque: 6.0 kg cm = 5.2 lb inch...

  • Page 62: Removing The Exhaust Fan Unit

    EPSON ELP-3500 Service Manual 3.2.5 Removing the Exhaust Fan Unit Prerequisite: Complete the steps explained in Section 3.2.1. Fan Holding Screw Exhaust Fan Plate Figure 3-12. Screws Figure 3-13. 1. Disconnect the cable connected to CN503. 2. Remove 4 screws from the fan holding plate to detach the fan and holding plate.

  • Page 63: Removing The Safety Switch

    EPSON ELP-3500 Service Manual 3.2.6 Removing the Safety Switch Prerequisite: Complete the steps explained in Section 3.2.1. Fast-on Tabs Safety Switch Screws Figure 3-14. 1. Disconnect the Fast-on tab terminals for the 2 cables connected to the safety switch. 2. Remove 2 mounting screws from the safety switch and detach the safety switch.

  • Page 64: Removing The Control Panel

    EPSON ELP-3500 Service Manual 3.2.7 Removing the Control Panel Prerequisite: Complete the steps explained in Section 3.2.1. Tabs Tabs Figure 3-15. 1. Pull down the tabs from inside. Then remove the control panel on the upper case. Figure 3-16. 3-13...

  • Page 65: Removing The Speaker Units

    EPSON ELP-3500 Service Manual 3.2.8 Removing the Speaker Units Prerequisite: Complete the steps explained in Section 3.2.1. Screws Screw Figure 3-17. 1. Remove 3 screws mounting the speaker unit and remove the speaker along with the bracket. Screws: +M3x8 F/Zn: P-Tight P/N 1021824 Mounting torque: 6.0 kg cm = 5.2 lb inch...

  • Page 66: Removing The Receptor Board Assembly

    EPSON ELP-3500 Service Manual 3.2.9 Removing the Receptor Board Assembly Prerequisite: Complete the steps explained in Section 3.2.1. Receptor Screw Power Supply Unit Board Figure 3-18. 1. Remove the screw mounting the receptor to the power supply unit. Screw: +M3x6 F/Ni: P/N 1033122 Mounting torque: 4.5 kg cm = 3.9 lb inch...

  • Page 67: Removing The Driver Board Assembly

    EPSON ELP-3500 Service Manual 3.2.10 Removing the Driver Board Assembly Prerequisite: Complete the steps explained in sections 3.2.1 and 3.2.4. Stud Screws CN900 CN850 CN950 Ground Plate Screws Figure 3-19. 1. (Although the illustration above shows 2 GND plate mounting screws and the GND plate, those parts are actually removed in step 2 of Section 3.2.4, on page 3-9.)

  • Page 68: Removing The Power Supply Unit

    EPSON ELP-3500 Service Manual 3.2.11 Removing the Power Supply Unit Prerequisite: Complete the steps explained in sections 3.2.1 and 3.2.4. Screws Power Supply Cables Figure 3-20. 1. Remove 2 lamp power supply cables connected with the lamp’s inner housing unit screws.

  • Page 69: Removing The Interface Unit Assembly

    EPSON ELP-3500 Service Manual 3.2.12 Removing the Interface Unit Assembly Prerequisite: Complete the steps explained in sections 3.2.1 and 3.2.4. Ground Cable Screw Screws Figure 3-21. 1. Remove the GND cable mounting screw. Screw: +M3x6 F/Ni: P/N 1033122 Mounting torque: 6.0 kg cm = 5.2 lb inch 2.

  • Page 70: Removing The Lamp Outer Housing Unit

    EPSON ELP-3500 Service Manual 3.2.13 Removing the Lamp Outer Housing Unit Prerequisite: Complete the steps explained in sections 3.2.1 and 3.2.6. Screws Lamp Air Guide Figure 3-22. Screw Figure 3-23. 1. Remove 2 lamp air guide mounting screws to detach the lamp air guide.

  • Page 71: Removing The Adjustable Foot Unit

    EPSON ELP-3500 Service Manual 3.2.14 Removing the Adjustable Foot Unit Prerequisite: Complete the steps explained in sections 3.2.1, 3.2.4, 3.2.10, and 3.2.11. Foot Lever Adjustable Foot Figure 3-24. Compression Foot Spring Lever Pin Foot Axis Foot Lever Figure 3-25. 1. Turn the adjustable foot counterclockwise about 40 times to remove it.

  • Page 72: Removing The Optical Block

    EPSON ELP-3500 Service Manual 3.2.15 Removing the Optical Block Prerequisite: Complete the steps explained in sections 3.2.1, 3.2.4, 3.2.5, 3.2.10, 3.2.11, 3.2.12, and 3.2.13. Screws Screws Figure 3-26. 1. Remove 4 optical block mounting screws. Screws: +Mx14 F/Zn Bind P Tight: P/N 1021825 Mounting torque: 6.0 kg cm = 5.2 lb inch...

  • Page 73: Removing The Projector Lens Unit (Plu)

    EPSON ELP-3500 Service Manual 3.2.16 Removing the Projector Lens Unit (PLU) Prerequisite: Complete the steps explained in sections 3.2.1, 3.2.4, 3.2.5, 3.2.10, 3.2.11, 3.2.12, 3.2.13, and 3.2.15. Screws Screw Screw Figure 3-28. 1. Remove 4 screws securing the projector lens unit (PLU) and remove the projector lens unit.

  • Page 74: Removing The Intake Fan/Optical Head Unit/Light Guide Unit

    EPSON ELP-3500 Service Manual 3.2.17 Removing the Intake Fan / Optical Head Unit / Light Guide Unit Prerequisite: Complete the steps explained in sections 3.2.1, 3.2.4, 3.2.5, 3.2.10, 3.2.11, 3.2.12, 3.2.13, and 3.2.15. Intake Fan Screws Figure 3-29. Intake fan 1.
  • Page 75 EPSON ELP-3500 Service Manual Optical Head Unit/Light Guide Unit Screws Figure 3-30. 1. Remove the mounting screw on the bottom of the optical head unit. Screw: +M4x8 F/Zn: P/N 1024565 Mounting torque: 6.0 kg cm = 5.2 lb inch 1. Remove 2 mounting screws on the top of the optical head unit before pulling the light guide unit up straight and separating it from the optical head unit.

  • Page 76: Removing The Inlet Unit

    EPSON ELP-3500 Service Manual 3.2.18 Removing the Inlet Unit Prerequisite: Complete the step explained in sections 3.2.1, 3.2.4, 3.2.5, 3.2.10, 3.2.11, 3.2.12, 3.2.13, and 3.2.15. Screw Figure 3-31. 1. Remove the inlet unit mounting screw. Screw: +M3x8 F/Zn P-Tight: P/N 1021824 Mounting torque: 6.0 kg cm = 5.2 lb inch...

  • Page 77: Disassembling And Assembling The Remote Control Unit

    EPSON ELP-3500 Service Manual 3.3 Disassembling and Assembling the Remote Control Unit The whole remote control unit is handled as a service part; its components are not designated as service parts. So, disassemble the remote control unit only to clean its trackball or buttons.

  • Page 78: Before Starting Troubleshooting Procedures

    4.1 Before Starting Troubleshooting Procedures 1. Before you replace a unit or block, double-check that it is actually defective. (For example, check that cables are connected properly.) 2. Find the points you want to check by examining the flowchart, and check those items during the troubleshooting procedure.

  • Page 79: First Action

    EPSON ELP-3500 Service Manual 4.2 First Action Follow the flowchart below before starting to troubleshoot projector problems, and proceed to the pertinent detailed flowchart (given on the next and subsequent pages). START If you cannot isolate problem, can you Replace the part...
  • Page 80 EPSON ELP-3500 Service Manual START SYSTEM INITIALIZATION Turn on power. Is lamp indicator Go to Does the projector have power Do the fans work? normal? “Display (POWER LED is lit)? Mode.” Reconnect the cable between Check CN502 and CN503 Check CN505 connection on...

  • Page 81: Display Mode

    EPSON ELP-3500 Service Manual START DISPLAY MODE (System Init is OK.) Does the screen appear? Go to Does the menu key work Does the lamp light? normally? “Video (Menu screen appears.) Display Mode.” Replace the lamp. Check CN850, 900, 950 connections on the driver board.
  • Page 82 EPSON ELP-3500 Service Manual START Video Display Mode (Display Mode is OK.) Check the projector with Is loop throughput Is video input OK? Does the Brightness a PC. Is PC input OK? control work with the video menu? Replace the main...
  • Page 83 EPSON ELP-3500 Service Manual START Audio Mode (Video is OK.) Does the volume Is audio out OK? Is speaker output OK? Go to “Picture Quality.” adjustment work with the remote control? Replace the remote Reconnect CN400 on the Reconnect CN501 on main board.

  • Page 84: Picture Quality

    EPSON ELP-3500 Service Manual Picture Quality START (Audio is OK.) Is the white balance Is there any flicker? Is there an intermittent Are there ghosts? sync signal problem? Replace the driver Replace the driver board. Adjust the white Adjust flicker.

  • Page 85: Remote Control

    EPSON ELP-3500 Service Manual Remote Control START (Picture quality is OK.) Good control. Does the wireless remote Do all buttons work? (Functions OK.) control work? Replace the batteries. Replace the remote control unit. Does the new one work? Do any buttons work?

  • Page 86: Image Adjustment Program

    5.1 Image Adjustment Program This program diskette contains the adjustment functions in the table below. Table 5-1. Number Image adjustment program function Flicker adjustment using a 16-level grayscale pattern Ghost adjustment using a vertical stripe pattern Sub contrast (tint) adjustment using a 16-level grayscale pattern To run this program, set up a host computer and monitor, and connect them to the projector using a computer cable and an RS-232C cable.

  • Page 87: Running The Program

    EPSON ELP-3500 Service Manual After completing the focus alignment, you should use the image adjustment program to obtain the best display quality. This program specify the electrical parameters in order to obtain best display quality. 5.1.2 Running the Program The image adjustment program is supplied on an MS-DOS diskette.
  • Page 88 8. Type RS353ASE then press Enter (A:\RS353AS\AS6>RS353ASE Enter) Image Adjustment Program Menu After the program starts, the following display appears on the computer screen. LCP Image Adjustment RS-353 Ver 2.10 SEIKO EPSON 0 Initialization 1 Flicker Adjustment 2 Ghost Adjustment...
  • Page 89 EPSON ELP-3500 Service Manual ***Flicker Adjustment*** COLOR RED Change data using arrow key. Left Arrow Key: down Right Arrow Key: up Select Enter Key: set Figure 5-4. 3. Use the arrow keys to increase or decrease the value by one. Find the display with the minimum flicker.
  • Page 90 EPSON ELP-3500 Service Manual adjustment menu Figure 5-5. 3. Use the right and left arrow keys to make the border line between each block in the pattern thinnest (least overlap in border lines, or no ghost image to the left or right of the border lines).
  • Page 91 EPSON ELP-3500 Service Manual adjustment menu Figure 5-6. 3. Use the right and left arrow keys to adjust the image so that the two patterns on the right side are brightest and are of equal intensity. When you press the left arrow key, an adjustment value from "0(00) to 64(40)"...
  • Page 92 EPSON ELP-3500 Service Manual Figure 5-7. 4. Data Transfer This menu option writes the settings into the projector’s flash ROM. The values you have set will not be saved in the projector unless you execute this menu step. Be sure to run this menu option after making any adjustment with the image adjustment program.
  • Page 93 EPSON ELP-3500 Service Manual Create New HEX file? [Y/N] File Name: File Name: 00400000.gam 00400000.gam Data Transfer <<Flash ROM download program>> Port: COM1 Baud Rate: 9600bps Parity: None Stop Bit: 1 Data Length: 8 Download Area: GAMMA GAMMA File: 00400000.GAM Are you sure? [Y/N] Y Flash download was successful.
  • Page 94 EPSON ELP-3500 Service Manual...

  • Page 95: Reference Materials (Parts List)

    A.1 Reference Materials Table A-1. ELP-3500 Parts List Figure Description Mfr. Part Min. Qty Specification Ref. No. Lower Case Unit 1031084 Lower Case 1031085 1-1-1 Foot Rubber 1031057 1-1-2 Lamp Cover Unit 1031113 Mini Clamp 1033021 Shield Sheet 1033649 Shield Gasket...
  • Page 96 EPSON ELP-3500 Service Manual Table A-1. ELP-3500 Parts List (Continued) Figure Description Mfr. Part Min. Qty Specification Ref. No. Lamp Outer Housing 1031104 Lamp Outer Housing Fixing Screw 1021824 3x8 F/Zn Lamp Inner Housing 1031106 Driver Board Assembly 3001950 Board Fixing Nat...
  • Page 97 EPSON ELP-3500 Service Manual Table A-1. ELP-3500 Parts List (Continued) Figure Description Mfr. Part Min. Qty Specification Ref. No. Accessory Box 5005332 Accessory Holder 5005333 Polyvinyl Bag 5004108 Soft Bag 5003353 Slip Sheet 4006219 UPC Code Label 1031070 Caution Label A (Lamp Exchange)

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